USA 253, 40099
Orbit data source: Space-Track
USA 253, 40099 is a payload satellite owned by USAF AFSPC (US) in GEO that was launched on Mon, 28 Jul 2014 UTC via a DELTA 4M+(4,2) launch vehicle from the Air Force Eastern Test Range (AFETR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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40099 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
OSC
Mission
Non-operational Defense Classified
Bus & Motor
GEOSTAR-1, AOCS
Mass
500 kg wet, 500 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 2.5 m
Radar Cross Section
7.621 m²
Expand to show TLE details & historyLast TLE update: 4 days ago
TLE from 4 days ago
0 USA 253
1 40099U 14043A 26280.00992043 -.00000145 00000-0 00000+0 0 9999
2 40099 5.7920 73.8470 0004283 122.1495 180.8167 0.96774268 28445Epoch: 2026-10-07T00:14Z
TLE epoch observation values (Epoch: 2026-10-07T00:14:17.125Z)
Latitude
-4.85897°
Longitude
-2.31183°
Altitude
36,815.363 km
Speed
3.037 km/s
True Right ascension
01h 07m 42s
True Declination
-4° 51' 15"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
23:32:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,816.012 km
Perigee altitude
36,779.027 km
Semi-major axis
43,175.656 km
Eccentricity
0.00043
Inclination
5.792°
RAAN
73.847°
Arg. of periapsis
122.1495°
True anomaly
180.816°
Mean anomaly
180.8167°
Eccentric anomaly
180.81635°
Mean motion
0.24193 °/min
Orbital period
1,488.05 mins
BSTAR
0
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Other satellites on launch #43 in the year 2014 (2014-07-28 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.USA 253 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 1440 mins | 2026-10-11 05:13:20.548Z | 120.725° SE | 2026-10-11 14:46:20.548Z | 118.441° SE | 29.8° | 2026-10-12 05:13:20.548Z | 132.954° SE |
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40099 neighbors
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Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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